Radiator cap



April 20 1926. 1,581,728

R. A. FRIEDLANDER ET AL RADIATOR CAP Filed Feb. 21 1 25 Patented Apr. 2t), 1925.

UNi'iii. PTENT issues 1 F F'I'CE RICHARD .Pl. FRIEDLANDER AND GEORGE E. GRAVENSTIHE, OF DAYTON, OHIO, AS- foIEGNOBS '20 THE S. H. THOMSON IvTANUFACTURZNG CQMPANY, O1 DAYTON, OHIO,

{JORPGBATIGN OF UI-IIO.

RADIATOR car.

Application filed February 21, 1925. Serial No. 10,955.

To ("/32 whom it may concern lie it known that we, RICHARD A- Finan- ]..tnnnn and Greece E. GRAVENSTINE, citi- Zens of the United States, residing in the city of Dayton, county of Montgomery, and t'ltate ct Uhio, have invented certain new and useful improvements in Radiator Caps, of which the following is a specification;

This invention relates to new and useful in'iprovements in radiator caps, and particu-.

larly those oi. the locking type.

it is the principal object of our invention to provide a simple and attractive radiator cap which may be economically manufactured for ei'licient service.

it is a. further object. of our invention to provide extremely simple means such as a screw, for locking the radiator cap against its unauthorized removal trom the neck of the radiator otter it has been set in the de sired position thereon.

A. further object of the invention is to provide for the cap a simple hinged cover to which a temperature indicating instrument may be secured agains removal there from by an unauthorized person.

It is still a further object of our invention to povide means for limiting" the opening movement of the hinged cover beyond a pointwhere the glass temperature indicating instrumentcarried by it will strike the ra diator and be broken by the impact.

A. further object of the invention is to provide between the cover and the cap a hinged connection comprising two hinge pins that cannot be driven out by an un authorized person.

it is still another object of the invention to provide a convenient catch or clip member tor loel'cingr the cover to the cap on the side opposite the hinged connection. between them.

Further important and incidental objects will be brought out in the following specification and particularly set forth in the suhjoined claims.

In the accompanying drawings, Figure 1 is a front view of our improved radiator cap. Figure 2 is a longitudinal sectional view taken on the line 22 of Figure 1, showing the general construction of the cap. Figure is a sectional view taken on the line 3-8 of Figure 2, showing the screw means for locking the cap to the neck of a the radiator against its removal by an unfor limiting the outward movement of the cover.

Referring to the aocon'ipanying drawings for a detailed description or the form of embodiment of our invent-ion illustrated therein. the numeral 1 designates the bottom part of a radiator caphaving an extenv nally threaded skirt 2 adapted to be screwed into an internslly-threaded radiator neck 3. (See Figures 1 and 2.)

Formed on the back side 01": the bottom Jart 1 of the cap, and extending above its top surface, is a wide U shaped hinge-pin receiving projection c. Loosely titted between the'arms 5. 5 ol thisprojection is the lower part of a i'shaped tongue or flange 6 formed on the back side of a cover plate 7 formed with two oppositely-disposed radial arms 8, 8. Formed in each side oi the tongue 6 a short distance below its flanged top is a horizontal hole 9 to receive a short hinpgepin 10 that is tigl'itly secured in a registering hole in a respective arm 5 of the U shaped projection l on the bottom part. 1 of the cap. These hingepins 10, 10, which are diilicult of removal by an unauthorized person, hingedly support the cover plate 7 at the back side of. the cap. (See Figures i and 5.)

Formed in the middle portion of the cover plate 7 is a hole to receive the eX- ternally threaded stem 11 of temperature indicating instrument 12 of a Common type. Surrounding the upper portion of the stem 11 of said instrument is a split lock washer 13 which is forced against the cover plate by a suitable nut 14. (See Figure 2.) Formedin this out is a threadedtap hole to receive a screw, 15 which, atter being; forced into tight engagement with the threaded stem 11 of the temperature indicating instrument 12, may be out olt approximately flush with the nut to prevent its removal so that the temperature indicating instrument may be locked on the cover plate.

When the cover plate 7 is opened, the flange top ends 16 1.6 of the tongue 6 on it will engage the arms 5, 5 on the U shaped projection 4- of the bottom part of the cap to stop the swinging movement of the cover plate before the temperature indicating instrument 12 which it carries can knock or strike the radiator (not shown) and be inj ured by the impact. (See Figure 5.)

Formed within thetop part of the bottom portion 1 of the radiator cap is an internal, annular flange 17 which acts as a support for a gasket 18 that an internal bottom flange 19 on the cover plate 7 is adapted to engage when the cap is closed thereby, thus sealing the opening in the cap against the escape of liquid from the radiator.

For the purpose of locking the cover plate 7 tightly in its closed position against the bottom part 1 of the cap, the following means are preferably employed. Project -ingtro1n the front side of the cover plate 7 are two lugs 19, 19 formed with oppositely-disposed holes which receive a pivot pin 20 that passes through a transverse hole in an inwardly projecting ear 21 formed on the top part of 'a catch. member 22 and p0- sitioned between said lugs. At the lower end of the catch member 22 there is formed an inwardly projecting lug 23 which is adapted to engage under a ledge at on the bottom part of the cap, to draw the cover plate 7 tightly against the gasket 18. The catch member 22 is preferably enlarged at its lower end, merging into a curved tip 25 which may be easily grasped by the fingers to engage the lug 23 with, and disengage it from, the ledge 24; on the bottom part 1 of the cap. (See Figures 1 and 2.)

- For the purpose of locking the cap on the radiator neck 3 against its removal by an unauthorizediperson, the following means are provided. Formed on the inner surface of thebottom part 1 of the cap, preferably below the ledge 24:, is a vertical boss 26 formed with an axial hole which extends from its bottom upwardly and through the flange 17 upon which the gasket 18 rests. (See Figures 2 and The externally tli readed wall of the bottom part- 1 of the cap is formed with a vertical slot that is opposite the axial hole in the boss 26 to. permit the projection thereth ough of the threads on a screw 27. The axial hole in the boss 26 is adapted to vertically receive this screw 27 whose threads run oppositely to the threads on the inner surface of the radiator neck and which are adapted to engage said threads on the latter through the slot in the bottom part 1 of the cap. Since in this instancethe radiator neck is formed with a right hand thread, a left hand screw 27 is employed, so that after the cap has been screwed down tightly into the neck of the radiator, with its arms 8, 8 in'proper alinement with the front of the latter, the screw 27 may be inserted in the boss 26 to project its threads, through the slot in the cap, into locking engagement with the oppositely running threads in the radiator neck to prevent the removal of the cap from it by an unauthorized person. Even after the screw is taken out, the radiator neck threads will have been so blunted by it as to make it extremely diiiicult to take the cap off.

The screw 27 thus provides an extremely simple and out of the way means for locking the cap on the radiator neck of an automobile. 4

Having described our invention, we claim:

1. The combination with a threaded l'tdiator neck, of a threaded radiator cap adapted to be screwed thereon, and a locking member bearing an external thread running oppositely to the thread of the radiator neck for vertical insertion between the latter and the radiator cap, for the purpose speeilied. I

2. The combination with a threaded radiator neck, of a threaded radiator cap adapted to be screwed thereon and formed with a vertical hole which opens through one side of the cap, and a screw insertible in said vertical hole, said screw having a threadrunning oppositely to the thread of the radiatorneck and adapted to lockingly engage the latterthread through the vertical hole in the side of the radiator cap it the latter is turned, for the purpose specified.

3. The combination with a. radiator neck formed with an internal thread, of a radiator cap having an'external thread adapted to be screwed in said radiator neck, said cap formed with a vertical hole which opens through the externally threaded portion of one side of the cap, and a screw insertible in said vertical hole, said screw having a thread running oppositely to the thread of the radiator neck and adapted to lockingly engage the latter thread through the vertical hole in the side of the radiator cap it the latter is turned, for the purpose specified.

In testimony whereof we have hereunto set our hands this 20th day of February, 1925.

RICHARD A. FRIEDLi-kNDl lR. GEORGE E. GRAVENSTINE, 

